<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登陆表单区域 -->
      <el-form ref="loginEromRef" :model="loginFrom" :rules="loginFromRules"  class="login_from" label-width="0px">
        <!-- 用户名区-->
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-user-solid" v-model="loginFrom.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input type="password" prefix-icon="el-icon-lock" v-model="loginFrom.password"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginFrom">重置</el-button>
        </el-form-item>
      </el-form>  
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
  data() {
    return {
      // 登陆表单的数据绑定对象
      loginFrom:{
        username:'admin',
        password:'123456'
      },
      // 表单的验证规则对象
      loginFromRules:{
        // 验证用户名
        username:[
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码
        password:[
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
    // 点击重置按钮，重置表单
    resetLoginFrom(){
      this.$refs.loginEromRef.resetFields()
    },
    //登录按钮功能区域
    login(){
      this.$refs.loginEromRef.validate(async valid=>{
        if(!valid) return
        const {data:res} = await this.$http.post('login',this.loginFrom)
        if(res.meta.status!==200) return this.$message.error('登陆失败')
        this.$message.success('登陆成功')
        window.sessionStorage.setItem('token',res.data.token)
        this.$router.push("/home")
      })
    }
  }
}
</script>

<style scoped>
  .login_container{
    background-color: #2b4b6b;
    height: 100%;
  }
  .login_box{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
  }
  .avatar_box{
    position: absolute;
    top: -50px;
    left: 50%;
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    transform: translateX(-50%);
    padding: 10px;
    box-shadow: 0,0,10px,#ddd;
    background-color: #fff;
  }
  .avatar_box img{
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
  .login_from{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
  .btns{
    display: flex;
    justify-content: flex-end;
  }
</style>>
